EP 0529164 A1 19930303 - Golf club shaft.
Title (en)
Golf club shaft.
Title (de)
Golfschlägerschaft.
Title (fr)
Manche de club de golf.
Publication
Application
Priority
- JP 23870291 A 19910826
- JP 24065091 A 19910827
Abstract (en)
A light weight, high strength carbon fiber golf club shaft (11) includes inner (1), intermediate (2) and outer (3) tubular layers formed of carbon fiber-reinforced plastic. The intermediate layer (2) is formed of high modulus, high strength carbon fibers having a modulus of 35000 kg/mm<2> or more while the outer layer (3) is formed of high strength carbon fibers having a modulus of 23000-30000 kg/mm<2>. The carbon fibers of the intermediate (2) and outer (3) layers are oriented at an angle in the range of 0 to 15 degrees with respect to the longitudinal axis of the shaft (11), while the carbon fibers of the inner layer (1) are oriented at an angle of 30 to 80 degrees. The weight ratio of the intermediate layer (2) to the outer layer (3) ranges from 15:85 to 50:50, and the weight of the inner layer is 30-60 % by weight based on the total weight of the three layers. The shaft (11) has a rigidity of 220-240 cycles per minute in terms of frequency and a weight of 63 g or less in the axial length of 1143 mm from the tip end. <IMAGE>
IPC 1-7
IPC 8 full level
A63B 53/10 (2006.01); B29C 70/20 (2006.01)
CPC (source: EP US)
A63B 53/10 (2013.01 - EP US); A63B 60/00 (2015.10 - US); B29C 70/207 (2013.01 - EP US); A63B 60/06 (2015.10 - EP US); A63B 60/08 (2015.10 - EP US); A63B 60/10 (2015.10 - EP US); A63B 2209/02 (2013.01 - EP US); B29L 2031/5227 (2013.01 - EP US); Y10S 273/23 (2013.01 - EP US); Y10T 428/1362 (2015.01 - EP US); Y10T 428/1369 (2015.01 - EP US)
Citation (search report)
- [A] US 3998458 A 19761221 - INOUE MITSUHIRO, et al
- [A] US 5028464 A 19910702 - SHIGETOH HIDETOSHI [JP]
- [A] PATENT ABSTRACTS OF JAPAN vol. 6, no. 2676 (M-78)26 July 1978 & JP-A-53 061 440 ( HITACHI KASEI KOGYO K.K. ) 1 June 1978
Designated contracting state (EPC)
DE GB
DOCDB simple family (publication)
US 5156396 A 19921020; AU 641051 B2 19930909; AU 8593591 A 19930325; EP 0529164 A1 19930303
DOCDB simple family (application)
US 77482391 A 19911011; AU 8593591 A 19911017; EP 91309460 A 19911015